49987439 has 2 divisors, whose sum is σ = 49987440. Its totient is φ = 49987438.

The previous prime is 49987433. The next prime is 49987453. The reversal of 49987439 is 93478994.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 49987439 - 2¹² = 49983343 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (49987433) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 24993719 + 24993720.

It is an arithmetic number, because the mean of its divisors is an integer number (24993720).

Almost surely, 2^49987439 is an apocalyptic number.

49987439 is a deficient number, since it is larger than the sum of its proper divisors (1).

49987439 is an equidigital number, since it uses as much as digits as its factorization.

49987439 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1959552, while the sum is 53.

The square root of 49987439 is about 7070.1795592474. The cubic root of 49987439 is about 368.3722972005.

The spelling of 49987439 in words is "forty-nine million, nine hundred eighty-seven thousand, four hundred thirty-nine".